C# Adding Properties To A Class At Runtime

Contents

Property names will come from database and also the total number of properies can be changed according to database value. Hi All, I need to create property in a class dynamically. Imagine, you have a class Foo, you instanciate a whole bunch of them, then decide to change the class. How to tell if I'm actually in a symlink location from command line? news

I'll try this. #6 (permalink) December 23rd, 2008, 07:57 AM joefawcett Wrox Author Points: 9,759, Level: 42 Activity: 0% Join Date: Jun 2003 Location: Exeter, , United Kingdom. If you choose to participate, the online survey will be presented to you when you leave the Msdn Web site.Would you like to participate? At IBM, he works as the lead security researcher on their static source code security analysis tool, which is used to find vulnerabilities in many different languages, including C# and Visual Since ExpandoObject can take delegates as members, this allows us to attach methods and events to these dynamic types while the code looks like you are addressing a static type.

C# Add Property To Object At Runtime

Are spectators born the same way as beholders? And and and... See AlsoSystem.Dynamic NamespaceReturn to top Show: Inherited Protected Print Export (0) Print Export (0) Share IN THIS ARTICLE Is this page helpful? Probably better off having a DynamicProperties property as the others have suggested. __________________ Joe http://joe.fawcett.name/ #7 (permalink) December 23rd, 2008, 11:28 AM planoie Friend of Wrox Points: 16,481, Level:

This method supports the Dynamic Language Runtime infrastructure for language implementers and it is not intended to be used directly from your code.GetType()Gets the Type of the current instance.(Inherited from Object.)MemberwiseClone()Creates Registration is fast, simple and absolutely free . dictionary[binder.Name.ToLower()] = value; // You can always add a value to a dictionary, // so this method always returns true. C# Expandoobject Example Classes derived from the DynamicObject class can override this method to specify dynamic behavior for operations such as setting a value for a property.TryUnaryOperation(UnaryOperationBinder, Object)Provides implementation for unary operations.

They both could hang off of ExpandoObject and make the syntax even cleaner, right? C# Reflection Add Property To Class Country changed to France, changing Language to French Setting Language to: French expando contains: Brian, France, French Changing Country to China... current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. http://stackoverflow.com/questions/6196022/adding-properties-dynamically-to-a-class more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed

share|improve this answer answered Jun 1 '11 at 3:45 Steve Wellens 17.9k21747 add a comment| up vote 2 down vote If you need to keep the class attributes in sync with Expandoobject Add Property Console.WriteLine(person.firstname + " " + person.lastname); // Getting the value of the Count property. // The TryGetMember is not called, // because the property is defined in the class. Please suggest me. Code: class MyProperty { public String name; public DataTypeDescriptor type; public Object value; } (I'm keeping this simple, just making everything public.

C# Reflection Add Property To Class

You can set them as long as the class already has the properties there and you just need to iterate a datarow and set them. https://www.oreilly.com/learning/building-c-objects-dynamically For your sake of convenience here is the link to show you how to create property dynamically: http://msdn.microsoft.com/en-us/library/system.reflection.emit.propertybuilder.aspx Santosh. C# Add Property To Object At Runtime the coder does not need to know the names of the properties before hand. C# Add Property To Existing Class At Runtime Welcome to the p2p.wrox.com Forums.

By K. navigate to this website For example, if you need only operations for setting and getting properties, you can override just the TrySetMember and TryGetMember methods.In C#, to enable dynamic behavior for instances of classes derived For more information, see Using Type dynamic (C# Programming Guide).In Visual Basic, dynamic operations are supported by late binding. Jay currently works at Newmarket, an Amadeus company. C# Create Dynamic Object With Properties

Code: class MyHolder { // I'm just making up some other members of the class... MyClass c = new MyClass(); Is it possible to add properties / fields to this class on run-time ? (I don't know what are their types or names on compile-time and This again takes advantage of ExpandoObject’s support of IDictionary: public static void AddEvent(ExpandoObject expando, string eventName, Action handler) { var expandoDict = expando as IDictionary; if (expandoDict.ContainsKey(eventName)) expandoDict[eventName] = More about the author Remark: Why you do not return a Dictionary instead of dynamic ? (in the very least, IDictionary) ?

I have a base class which is called in a foreach loop. C# Reflection Add Property To Object We hook up the event handler and when the Country property is changed, we fire the CountryChanged event. ((INotifyPropertyChanged)expando).PropertyChanged += new PropertyChangedEventHandler((sender, ea) => { dynamic exp = sender as dynamic; Example: Say you have a class that describes these "properties" that you want to dynamically add.

COUNT vs.

However... Formal notation of the sum of the first n numbers raised to the power of 2 How can I publish data from a private network without adding a bidirectional link to For example, you can create an instance of the DynamicObject class in C# and then pass it to an IronPython function. C# Add Property To Anonymous Object dynamic expando = new ExpandoObject(); expando.Cost= 42.0; expando.ItemName = "Shoes"; share|improve this answer answered Jun 1 '11 at 3:47 BrokenGlass 115k11202256 In addition, look in the System.Dynamic namespace.

I have tried with CodeDOM, but unable to solve. Jay Hilyard Jay Hilyard has been developing applications for the Windows platform for over 20 years, including .NET. Is improving a simple algorithm without beating the state of the art still publishable? http://wcinam.com/add-property/adding-properties-runtime-c.php And it's going to cover these kinds of subjects in a lot more depth than anyone can, just posting messages in these silly little windows. #5 (permalink) December 23rd,

If thesewon't do good to your question, youcould “Unmark As Answer”. In it, you’ll find recipes on asynchronous methods, dynamic objects, enhanced error handling, the Rosyln compiler, and more. LanguageChanged will be added after defining the eventHandler variable to hold the Action and CountryChanged we will add directly as an inline anonymous method. This is a community of tens of thousands of software programmers and website developers including Wrox book authors and readers.